Shield: From the Provincial Seal of Bulacan where the town is located.
Cave: Madlum Cave and its important contribution to the town's history. Place where image of their Patron Saint St. Michael the Archangel was taken and after whom the town was named.
Biak-na-Bato: Town's contribution to Filipino aspirations, ideals and libertarian struggle. It is also the seat of Biak-na-Bato Government headed by Gen. Emilio Aguinaldo.
Sibul Health Resort: One of the most beautiful and scenic spot of the town with bath houses filled with medicinal sulfuric water.